This update upgrades Thunderbird from 1.0.8 to 1.5.0.7. This step was necessary since the 1.0.x series is not supported by upstream any more. Various flaws have been reported that allow an attacker to execute arbitrary code with user privileges by tricking the user into opening
a malicious email containing JavaScript. Please note that JavaScript is disabled by default for emails, and it is not recommended to enable it. The following CVEIDs have been addressed: CVE-2006-3113, CVE-2006-3802, CVE-2006-3803, CVE-2006-3805, CVE-2006-3806, CVE-2006-3807, CVE-2006-3809, CVE-2006-3810, CVE-2006-3811, CVE-2006-3812, CVE-2006-4253, CVE-2006-4565, CVE-2006-4566, CVE-2006-4571 CVE-2006-3804, CVE-2006-4340, CVE-2006-4567, CVE-2006-4570